| 证明HSK 4 | zhèng míng | proof; certificate; identification; testimonial; Classifiers: 个 ; to prove; to testify; to confirm the truth of | |
| 保证HSK 4 | bǎo zhèng | guarantee; to guarantee; to ensure; to safeguard; to pledge; Classifiers: 个 | |
| 证据HSK 5 | zhèng jù | evidence; proof; testimony | |
| 证实HSK 6 | zhèng shí | to confirm (sth to be true); to verify | |
| 证券 | zhèng quàn | negotiable security (financial); certificate; stocks and bonds |
| 1 | This is my work ID. | |
| 2 | His visa has expired. | |
| 3 | Those pieces of evidence are indeed convincing. | |
| 4 | This issue requires further investigation. | |
| 5 | I can't find my ID card. |